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Java > Open Source Codes > org > jboss > kernel > plugins > dependency > ClassContextDependencyItem


1 /*
2 * JBoss, Home of Professional Open Source
3 * Copyright 2005, JBoss Inc., and individual contributors as indicated
4 * by the @authors tag. See the copyright.txt in the distribution for a
5 * full listing of individual contributors.
6 *
7 * This is free software; you can redistribute it and/or modify it
8 * under the terms of the GNU Lesser General Public License as
9 * published by the Free Software Foundation; either version 2.1 of
10 * the License, or (at your option) any later version.
11 *
12 * This software is distributed in the hope that it will be useful,
13 * but WITHOUT ANY WARRANTY; without even the implied warranty of
14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
15 * Lesser General Public License for more details.
16 *
17 * You should have received a copy of the GNU Lesser General Public
18 * License along with this software; if not, write to the Free
19 * Software Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA
20 * 02110-1301 USA, or see the FSF site: http://www.fsf.org.
21 */
22 package org.jboss.kernel.plugins.dependency;
23
24 import org.jboss.dependency.spi.Controller;
25 import org.jboss.dependency.spi.ControllerContext;
26 import org.jboss.dependency.spi.ControllerState;
27 import org.jboss.dependency.plugins.AbstractDependencyItem;
28 import org.jboss.util.JBossStringBuilder;
29
30 /**
31  * A Class context dependencyItem.
32  *
33  * @author <a HREF="ales.justin@gmail.com">Ales Justin</a>
34  */
35 public class ClassContextDependencyItem extends AbstractDependencyItem
36 {
37    public ClassContextDependencyItem(Object JavaDoc name, Class JavaDoc demandClass, ControllerState whenRequired, ControllerState dependentState)
38    {
39       super(name, demandClass, whenRequired, dependentState);
40    }
41
42    public boolean resolve(Controller controller)
43    {
44       ControllerContext context = controller.getInstalledContext(getIDependOn());
45       if (context != null)
46       {
47          setIDependOn(context.getName());
48          addDependsOnMe(controller, context);
49          setResolved(true);
50       }
51       else
52       {
53          setResolved(false);
54       }
55       return isResolved();
56    }
57
58    public void unresolved(Controller controller)
59    {
60       setIDependOn(null);
61       super.unresolved(controller);
62    }
63
64    public void toString(JBossStringBuilder buffer)
65    {
66       super.toString(buffer);
67       buffer.append(" demandClass=").append(getIDependOn());
68    }
69
70    public void toShortString(JBossStringBuilder buffer)
71    {
72       buffer.append(getName()).append(" demands ").append(getIDependOn());
73    }
74
75 }
76
77
78
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